One layer of the subplot the description was taken from, used to build the description dialog's layer tab strip.
Present only for multi-layer subplots: a single-layer subplot offers no choice, and the dialog omits the strip entirely.
Zero-based layer index within the subplot.
How the layer names itself — the producer's name when there is one, and the chart-type label otherwise. See Trace.layerLabel.
name
Trace.layerLabel
True if this is the layer the description currently describes.
One layer of the subplot the description was taken from, used to build the description dialog's layer tab strip.
Present only for multi-layer subplots: a single-layer subplot offers no choice, and the dialog omits the strip entirely.